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author:

Pagliaro, Maria V. (Pagliaro, Maria V..) [1] | Wen, Cuilian (Wen, Cuilian.) [2] (Scholars:温翠莲) | Sa, Baisheng (Sa, Baisheng.) [3] (Scholars:萨百晟) | Liu, Baoyu (Liu, Baoyu.) [4] | Bellini, Marco (Bellini, Marco.) [5] | Bartoli, Francesco (Bartoli, Francesco.) [6] | Sahoo, Sanjubala (Sahoo, Sanjubala.) [7] | Singh, Ramesh K. (Singh, Ramesh K..) [8] | Alpay, S. Pamir (Alpay, S. Pamir.) [9] | Miller, Hamish A. (Miller, Hamish A..) [10] | Dekel, Dario R. (Dekel, Dario R..) [11]

Indexed by:

SCIE

Abstract:

Anion-exchange membrane fuel cells (AEMFCs) are a promising electrochemical power generation technology that will most likely find applications in stationary power supply and mobile applications such as electric vehicles in the future. One of the main technological challenges with AEMFCs is developing catalysts with improved activities to reduce the current over -potential losses in the cell. A historically underappreciated challenge for AEMFC catalyst development is the sluggish hydrogen oxidation reaction (HOR) kinetics at the anode that still requires high loadings of platinum group metals. Here, we demonstrate that the alkaline HOR activity of palladium nano -particles is enhanced through strong interactions with transition -metal oxides. A series of transition-metal oxides in the IV oxidation state (ZrO2, CeO2, SnO2, and RuO2) were deposited onto Vulcan XC-72 carbon. Pd nanoparticles (20 wt %) were then grown on each support. This series of catalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy. The alkaline HOR activity was investigated using cyclic voltammetry and linear sweep voltammetry. Of the several systems that were considered, Pd-RuO2/C displayed the highest HOR surface-specific activity (49 mu A cm(Pd)(-2)). It had an onset for CO electro-oxidation at around 200 mV, which is lower than the other materials analyzed herein. The results were explained using first-principles calculations by investigating Tafel and Volmer reactions. These results suggested that increased HOR activity is favored by the population of the Pd surface with OH- groups at lower overpotentials. These insights are valuable for the future design of next-generation catalysts with high activity toward alkaline HOR required by future high-performance AEMFCs.

Keyword:

anion-exchange membrane fuel cells hydrogen oxidation reaction metal-support interactions palladium transition-metal oxides

Community:

  • [ 1 ] [Pagliaro, Maria V.]Inst Chem OrganoMetall Cpds, ICCOM, CNR, I-50019 Florence, Italy
  • [ 2 ] [Bellini, Marco]Inst Chem OrganoMetall Cpds, ICCOM, CNR, I-50019 Florence, Italy
  • [ 3 ] [Bartoli, Francesco]Inst Chem OrganoMetall Cpds, ICCOM, CNR, I-50019 Florence, Italy
  • [ 4 ] [Miller, Hamish A.]Inst Chem OrganoMetall Cpds, ICCOM, CNR, I-50019 Florence, Italy
  • [ 5 ] [Wen, Cuilian]Fuzhou Univ, Coll Mat Sci & Engn, Multiscale Computat Mat Facil, Fuzhou 350100, Peoples R China
  • [ 6 ] [Sa, Baisheng]Fuzhou Univ, Coll Mat Sci & Engn, Multiscale Computat Mat Facil, Fuzhou 350100, Peoples R China
  • [ 7 ] [Liu, Baoyu]Fuzhou Univ, Coll Mat Sci & Engn, Multiscale Computat Mat Facil, Fuzhou 350100, Peoples R China
  • [ 8 ] [Wen, Cuilian]Fuzhou Univ, Coll Mat Sci & Engn, Key Lab Ecomat Adv Technol, Fuzhou 350100, Peoples R China
  • [ 9 ] [Sa, Baisheng]Fuzhou Univ, Coll Mat Sci & Engn, Key Lab Ecomat Adv Technol, Fuzhou 350100, Peoples R China
  • [ 10 ] [Liu, Baoyu]Fuzhou Univ, Coll Mat Sci & Engn, Key Lab Ecomat Adv Technol, Fuzhou 350100, Peoples R China
  • [ 11 ] [Bartoli, Francesco]Univ Siena, Dept Biotechnol Chem & Pharm, I-53100 Siena, Italy
  • [ 12 ] [Sahoo, Sanjubala]Univ Connecticut, Dept Mat Sci & Engn, Storrs, CT 06269 USA
  • [ 13 ] [Alpay, S. Pamir]Univ Connecticut, Dept Mat Sci & Engn, Storrs, CT 06269 USA
  • [ 14 ] [Sahoo, Sanjubala]Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA
  • [ 15 ] [Alpay, S. Pamir]Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA
  • [ 16 ] [Singh, Ramesh K.]Technion Israel Inst Technol, Wolfson Dept Chem Engn, IL-3200003 H_efa, Israel
  • [ 17 ] [Dekel, Dario R.]Technion Israel Inst Technol, Wolfson Dept Chem Engn, IL-3200003 H_efa, Israel
  • [ 18 ] [Singh, Ramesh K.]Technion Israel Inst Technol, Nancy & Stephen Grand Techn Energy Program, IL-3200003 H_efa, Israel
  • [ 19 ] [Dekel, Dario R.]Technion Israel Inst Technol, Nancy & Stephen Grand Techn Energy Program, IL-3200003 H_efa, Israel

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ACS CATALYSIS

ISSN: 2155-5435

Year: 2022

Issue: 17

Volume: 12

Page: 10894-10904

1 2 . 9

JCR@2022

1 1 . 7 0 0

JCR@2023

ESI HC Threshold:74

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 19

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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